Nut-lock



(No Model.) J

W. W. KING 86 P. M-.- DUNN.

NUT LOGK.

No. 514,623. Patented Feb.- 13,1894.

Fig.1.

W ILLIAM WILEY KING AND FRANCIS MARION DUNN, OF VELLMAN, MISSISSIPPI.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 514,623, dated February13, 1894.

Application filed April 21, 1893. Serial No. 471,314. (No model.)

To all whom it may concern:

Be it known that we, WILLIAM WILEY KING and FRANCIS MARION DUNN,citizens of the United States, residing at Wellman, in the county ofLincoln and State of Mississippi, have lnvented certain new and usefulImprovements in Nut-Locks; and we do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertalns to make and use thesame, reference bemghad to the accompanying drawings, and to'lzheletters of reference marked thereon,which form a part of thisspecification.

Our invention has reference to new and novel improvements in not locksdesigned es-' pecially to be employed in connection with the bolts andnuts for securing the meeting ends of railroad rails, and has for itsobject to provide a lock which will operate automatically to prevent thenut from becoming detached when the same is screwed in place, and whichwill readily permit the removal of the not when desired without in anyway impairing the parts.

Our invention consists essentially in a bolthavinga lengthwisedepression which receives a latch, the outer end of which engages thenot when the lalter is in place; and the inner end being so formed thatpressure being applied by the nut, the latch is rendered selflocking.

The construction, relative arrangement and operation of the severalparts of our improved not lock will now be particularly described, andreference is to be had in connection with such description to theaccompanying drawings which form a part thereof, and in which Figure 1,illustrates in elevation our improved nut lock in position; Fig. 2, alongitudinal section thereof and Fig. 3, a perspective view of the latchemployed in connection with the bolt and nut.

The reference letter a. denotes the rail and b b are the fish platesbetween which the rail is confined. The rail and fish plates areperforated to receive the bolto which is provided at one end with asquare or other shaped head 0', and is exteriorly screw-threaded toreceive the nut cl. Lengthwise of the bolt is a groove 8 which isarranged centrally and in line with a groove f formed on the inner sideof the head and at the junction of these two grooves is a depression ewhich forms a continuation of the groove e.

The latch for locking the nut is shown atg and is adapted to be seatedin the groove e which is of sufficient depth to receive it. On the innerlower end of the latch is a projection 72, which fits within thedepression 6 when the latch is in place, and extending above this innerend is a finger o', the outer side of which is inclined and fits partlywithin the groovefin the head of the bolt. On the outer end of the latchis a hook j which is normally entirely within the groove to permit ofthe attachment of the nut. The outer side of the finger projectssuficiently beyond the inner face of the head 0 to permit of itsengagement with the surface of the fish plate, or an interposed washerk.-

In operation the bolt is passed through the rail and fish plates, thefinger being in contact with the washer 7c. The nut is then screwed onand passes over the hook j, and pressure being applied by the nut, thefinger is moved by its contact with the washer entirely'within thegroove in the head of the nut. The inward movement of the fingeroperates through the fulcrum at h to raise the outer hooked end of thelatch to engage the outer face of the nut and prevent its accidentalremoval. l/Vhen it is desired to disconnect the not the hook may beforced downward sufficiently to permit the nut to pass over it. One ormore washers may be employed according to the width of the rail and fishplates, or if desired the head of the bolt or the nut may contactdirectly with the plates.

hat we claim as our invention is 1. A nut lock comprising in combinationa grooved bolt, a out, a latch adapted to fit said groove having at itsinner end a finger for contact with the'body or an interposed washer,and having at its outer end a shoulder adapted to be depressed by thenut and to be raised by the finger after the nut is in place,substantially as set forth.

2. A nut lock comprising in combination the bolt having the groove 6,the head having the groove f, the depression 6' at the inner end of thegroove, the nut, and the spring Iatch having the finger olfor the groovef, pro- 5 ection h for the depression, and the hook j at the outer end,substantiellyas and for the purposes set forth.

In testimony whereof we aifix our signatures in presence of twowitnesses.

WILLIAM WILEY KING.

FRANCIS MARION DUNN. Witnesses:

A. M. MOMILLAN, WESLEY HAYNES.

